- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUES
- SEE ALSO

# NAME

SSL_get_version - get the protocol version of a connection.

# SYNOPSIS

     #include <openssl/ssl.h>

     const char *SSL_get_version(const SSL *ssl);

# DESCRIPTION

`SSL_get_version()` returns the name of the protocol used for the connection ssl. It should only be called after the initial handshake has been completed. Prior to that the results returned from this function may be unreliable.

# RETURN VALUES

The following strings can be returned:

SSLv2

  The connection uses the SSLv2 protocol.

SSLv3

  The connection uses the SSLv3 protocol.

TLSv1

  The connection uses the TLSv1.0 protocol.

TLSv1.1

  The connection uses the TLSv1.1 protocol.

TLSv1.2

  The connection uses the TLSv1.2 protocol.

unknown

  This indicates an unknown protocol version.

# SEE ALSO

ssl